我有在jsFiddle中运行的代码，但是一旦你在本地运行它，它就不起作用。
导致此代码工作的原因是jsFiddle，但不是本地的？本地代码只不过是对jsFiddle中的内容的精确复制和粘贴。
干杯！
本地运行代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Blob.net</title>
<style>
#container {
background-color:#CCC;
margin-top: 100px;
margin-right: auto;
margin-bottom: 100px;
margin-left: auto;
width: 1200px;
height: auto;
box-shadow: 0px 0px 10px 2px rgba(119, 119, 119, 0.75);
-moz-box-shadow: 0px 0px 10px 2px rgba(119, 119, 119, 0.75);
-webkit-box-shadow: 0px 0px 10px 2px rgba(119, 119, 119, 0.75);
}
/* HEADER CSS */
#header {
width: 100%;
height: 75px;
background-color: #FC6;
padding-top: 2px;
padding-bottom: 10px;
}
#header_text h1{
font-family: "Arial Black", Gadget, sans-serif;
margin-left: 32%;
}
/* CONTENT CSS */
#left {
width: 800px;
height: auto;
background-color: #CF9;
float: left;
}
#left_inside {
padding-left: 15px;
padding-right: 15px;
margin-bottom: 30px;
}
#left p {
font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
}
/* SIDEBAR CSS */
#right {
width: 400px;
height: auto;
background-color:#6CF;
float: right;
}
.elements {
border: 1px solid #000;
height: auto;
width: 400px;
min-height: 180px;
}
/* NAV BAR STYLES */
#right ul {
list-style-type: none;
margin-left: 25%;
}
#right ul li{
margin-top: 30px;
}
#right ul li a:link{
text-decoration: none;
font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
font-size: 18px;
color: #000;
}
#right ul li a:hover{
color: #CCC;
}
/* ROWS */
.row1 {
background-color:#930;
}
.row2 {
background-color: #633;
}
.row3 {
background-color: #C66;
}
.row4 {
background-color: #96F;
}
.row5 {
background-color: #FF0;
}
/* END SIDEBAR CSS */
.clear {
clear: both;
}
/* MAKE SIDE BAR STICKY*/
.stick {
position: fixed;
bottom: 0;
}
</style>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8/jquery.min.js"></script>
<script>
var initialpos=$('#right').offset();
$('#container').css('max-height',$('#container').height()+'px')
var set=0;
$(window).scroll(function(e){
var currPos=document.getElementById('right').getBoundingClientRect();
var windowScrolled=$(window).scrollTop();
var containerBottom=$('#container').height()+$('#container').offset().top;
var windowScrolledafterRight = $(window).scrollTop()+$('#right').height();
if(windowScrolled>initialpos.top && containerBottom>windowScrolledafterRight){
$('#right').css({'margin-top':$(window).scrollTop()-initialpos.top});
set=1;
}
if(containerBottom<windowScrolledafterRight)
{
$('#right').css({'margin-top':$('#container').height()- $('#header').height()-10-$('#right').height()});
}
if(windowScrolled<initialpos.top)
{
$('#right').css({'margin-top':'0'});
}
})
</script>
</head>
<body>
<!-- MAIN CONTAINER -->
<div id="container">
<!-- HEADER -->
<div id="header">
<div id="header_text">
<h1>This is a fancy header</h1>
</div>
</div>
<!-- END HEADER -->
<!-- MAIN CONTENT -->
<div id="left">
<div id="left_inside">
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</div>
</div>
<!-- END MAIN CONTENT -->
<!-- SIDEBAR -->
<div id="right">
<div id="anchor">
<div class="elements row1">
<ul>
<li><a href="#">Home</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Contact Us</a></li>
<li><a href="#">Photos</a></li>
</ul>
</div>
<div class="elements row2">
</div>
<div class="elements row3">
</div>
<div class="elements row4">
</div>
<div class="elements row5">
</div>
</div>
</div>
<!-- END SIDEBAR -->
<div class="clear"></div>
</div><!-- END MAIN CONTAINER -->
</body>
</html>
答案 0 :(得分：1)
在尝试选择元素之前，必须确保元素存在。您可以采取以下三种方式之一：
在其定位的元素之后包含代码（通常在结束正文标记之前）
$(document).ready(function(){...})让你的代码在DOMContentLoaded事件之后执行
$(window).load(function(){...})让您的代码在所有资源完全加载后执行（称为窗口加载事件）
答案 1 :(得分：0)
问题是没有加载jquery.js文件。这就是我修复我的方式。下载文件包含html doc中的脚本。 例如：
<script type='text/javascript' src='jquery-1.9.1.js'></script>